Good day. I once had a flashlight. Powered by type C batteries, shone so-so, but I liked the quality of the case and appearance. And recently I found him in the pantry. The insides (a burned out bulb, a scratched reflector and oxidized contacts of the battery compartment) went to the trash, and I use the case in this homemade. Let's start.
Materials and Tools
- old lamp (housing)
- bright LEDs
- radiator
- dc-dc step-up mt3608
- li-ion 18650
- li-ion battery charge controller
- wires
- soldering iron
- hot glue
- second glue
- thermal grease
- sealant
I have a lantern housing:
Let's start by soldering the LEDs onto the pad. I used 4 white superbright LEDs with a power of 1 watt each. Ordered on.
It turned out like this:
LEDs are soldered in series. Next, take a radiator
(I took it from the old computer motherboard), apply thermal grease, drip a little second glue and firmly press the parts together for a few seconds.
Next, we take a 18650 battery and a charge controller with protection.
Quickly solder the wires to the battery terminals, avoiding strong heating.
Solder the other ends of the wires to the charge / discharge controller board observing the polarity. We check everything, insert it into the lamp housing.
So that the battery fits tightly inside the flashlight, I cut out 2 rings from the seal and put them on the battery. Like this:
Then I soldered the negative wire from the charge controller through the flashlight switch to the minus of the dc-dc converter, and the plus directly to the plus of the converter.
We solder the LEDs to the output contacts of the converter. We insert the LEDs on the radiator into the case and screw the cover.
Using a variable resistor, we select such a voltage on the dc-dc boost converter that the LEDs burn brightly enough, but at the same time, the heat sink is not strong. I set the voltage to 12.5V.
The flashlight shines very brightly near, practically does not shine in the distance, but I set the task to make a flashlight with a wide angle of illumination. It’s very good to light the road in front of you.
Thanks to all!